201 lines
6.7 KiB
C
201 lines
6.7 KiB
C
/**************************************************************************/
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/* */
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/* OCaml */
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/* */
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/* Xavier Leroy and Damien Doligez, INRIA Rocquencourt */
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/* */
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/* Copyright 1996 Institut National de Recherche en Informatique et */
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/* en Automatique. */
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/* */
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/* All rights reserved. This file is distributed under the terms of */
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/* the GNU Lesser General Public License version 2.1, with the */
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/* special exception on linking described in the file LICENSE. */
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/* */
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/**************************************************************************/
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#define CAML_INTERNALS
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/* Some runtime initialization functions that are common to bytecode
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and native code. */
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#include <stdio.h>
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#include "caml/backtrace.h"
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#include "caml/memory.h"
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#include "caml/callback.h"
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#include "caml/major_gc.h"
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#ifndef NATIVE_CODE
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#include "caml/dynlink.h"
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#endif
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#include "caml/osdeps.h"
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#include "caml/startup_aux.h"
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#include "caml/memprof.h"
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#ifdef _WIN32
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extern void caml_win32_unregister_overflow_detection (void);
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#endif
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CAMLexport header_t *caml_atom_table = NULL;
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/* Initialize the atom table */
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void caml_init_atom_table(void)
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{
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caml_stat_block b;
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int i;
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/* PR#9128: We need to give the atom table its own page to make sure
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it does not share a page with a non-value, which would break code
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which depend on the correctness of the page table. For example,
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if the atom table shares a page with bytecode, then functions in
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the runtime may decide to follow a code pointer in a closure, as
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if it were a pointer to a value.
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We add 1 padding at the end of the atom table because the atom
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pointer actually points to the word *following* the corresponding
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entry in the table (the entry is an empty block *header*).
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*/
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asize_t request = (256 + 1) * sizeof(header_t);
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request = (request + Page_size - 1) / Page_size * Page_size;
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caml_atom_table =
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caml_stat_alloc_aligned_noexc(request, 0, &b);
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for(i = 0; i < 256; i++) {
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caml_atom_table[i] = Make_header(0, i, Caml_black);
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}
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if (caml_page_table_add(In_static_data,
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caml_atom_table, caml_atom_table + 256 + 1) != 0) {
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caml_fatal_error("not enough memory for initial page table");
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}
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}
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/* Parse the OCAMLRUNPARAM environment variable. */
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uintnat caml_init_percent_free = Percent_free_def;
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uintnat caml_init_max_percent_free = Max_percent_free_def;
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uintnat caml_init_minor_heap_wsz = Minor_heap_def;
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uintnat caml_init_heap_chunk_sz = Heap_chunk_def;
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uintnat caml_init_heap_wsz = Init_heap_def;
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uintnat caml_init_max_stack_wsz = Max_stack_def;
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uintnat caml_init_major_window = Major_window_def;
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uintnat caml_init_custom_major_ratio = Custom_major_ratio_def;
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uintnat caml_init_custom_minor_ratio = Custom_minor_ratio_def;
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uintnat caml_init_custom_minor_max_bsz = Custom_minor_max_bsz_def;
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extern int caml_parser_trace;
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uintnat caml_trace_level = 0;
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int caml_cleanup_on_exit = 0;
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static void scanmult (char_os *opt, uintnat *var)
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{
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char_os mult = ' ';
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unsigned int val = 1;
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sscanf_os (opt, T("=%u%c"), &val, &mult);
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sscanf_os (opt, T("=0x%x%c"), &val, &mult);
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switch (mult) {
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case 'k': *var = (uintnat) val * 1024; break;
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case 'M': *var = (uintnat) val * (1024 * 1024); break;
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case 'G': *var = (uintnat) val * (1024 * 1024 * 1024); break;
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default: *var = (uintnat) val; break;
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}
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}
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void caml_parse_ocamlrunparam(void)
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{
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char_os *opt = caml_secure_getenv (T("OCAMLRUNPARAM"));
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uintnat p;
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if (opt == NULL) opt = caml_secure_getenv (T("CAMLRUNPARAM"));
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if (opt != NULL){
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while (*opt != '\0'){
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switch (*opt++){
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case 'a': scanmult (opt, &p); caml_set_allocation_policy ((intnat) p);
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break;
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case 'b': scanmult (opt, &p); caml_record_backtrace(Val_bool (p));
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break;
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case 'c': scanmult (opt, &p); caml_cleanup_on_exit = (p != 0); break;
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case 'h': scanmult (opt, &caml_init_heap_wsz); break;
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case 'H': scanmult (opt, &caml_use_huge_pages); break;
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case 'i': scanmult (opt, &caml_init_heap_chunk_sz); break;
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case 'l': scanmult (opt, &caml_init_max_stack_wsz); break;
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case 'M': scanmult (opt, &caml_init_custom_major_ratio); break;
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case 'm': scanmult (opt, &caml_init_custom_minor_ratio); break;
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case 'n': scanmult (opt, &caml_init_custom_minor_max_bsz); break;
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case 'o': scanmult (opt, &caml_init_percent_free); break;
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case 'O': scanmult (opt, &caml_init_max_percent_free); break;
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case 'p': scanmult (opt, &p); caml_parser_trace = (p != 0); break;
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case 'R': break; /* see stdlib/hashtbl.mli */
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case 's': scanmult (opt, &caml_init_minor_heap_wsz); break;
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case 't': scanmult (opt, &caml_trace_level); break;
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case 'v': scanmult (opt, &caml_verb_gc); break;
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case 'w': scanmult (opt, &caml_init_major_window); break;
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case 'W': scanmult (opt, &caml_runtime_warnings); break;
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case ',': continue;
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}
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while (*opt != '\0'){
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if (*opt++ == ',') break;
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}
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}
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}
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}
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/* The number of outstanding calls to caml_startup */
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static int startup_count = 0;
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/* Has the runtime been shut down already? */
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static int shutdown_happened = 0;
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int caml_startup_aux(int pooling)
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{
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if (shutdown_happened == 1)
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caml_fatal_error("caml_startup was called after the runtime "
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"was shut down with caml_shutdown");
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/* Second and subsequent calls are ignored,
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since the runtime has already started */
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startup_count++;
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if (startup_count > 1)
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return 0;
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if (pooling)
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caml_stat_create_pool();
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return 1;
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}
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static void call_registered_value(char* name)
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{
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const value *f = caml_named_value(name);
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if (f != NULL)
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caml_callback_exn(*f, Val_unit);
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}
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CAMLexport void caml_shutdown(void)
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{
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if (startup_count <= 0)
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caml_fatal_error("a call to caml_shutdown has no "
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"corresponding call to caml_startup");
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/* Do nothing unless it's the last call remaining */
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startup_count--;
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if (startup_count > 0)
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return;
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call_registered_value("Pervasives.do_at_exit");
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call_registered_value("Thread.at_shutdown");
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caml_finalise_heap();
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caml_free_locale();
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#ifndef NATIVE_CODE
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caml_free_shared_libs();
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#endif
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caml_stat_destroy_pool();
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#if defined(_WIN32) && defined(NATIVE_CODE)
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caml_win32_unregister_overflow_detection();
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#endif
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shutdown_happened = 1;
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}
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